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CVE-2026-89058

Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config

Published: Sep 18, 2026Updated: Sep 19, 2026 Sources: CVE List NVDCWE-942
7.4HIGH
NVD MITRE
EPSS Score
0.3%
Top 73.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-942

Affected Products

Red Hat
commercial·US
Red Hat build of Apache Camel 4 for Quarkus 3LibraryLibrary
OSS Libraries / generic-library
Red Hat build of Apicurio Registry 3On-prem
DevTools & CI
Red Hat build of Debezium 3On-premLibrary
OSS Libraries / generic-library
Red Hat Build of Keycloak
Web & CMS Plugins
Red Hat build of QuarkusLibraryLibrary
OSS Libraries / generic-library
Red Hat Certificate System 10On-prem
Operating Systems / linux-distro
Red Hat Certificate System 11On-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
and 9 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://access.redhat.com/security/cve/CVE-2026-89058
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2519775
bugzilla.redhat.com
https://github.com/resteasy/resteasy/commit/efeb2b7
github.com
and 1 more references View all →

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